I use to be into Saltwater and have a Calcium reactor, fully automated if I add a contoller. Do any of you know if this can be used for Co2 automation?

Thanks,
Jarrell

What would you be using the calcium reactor for.
What you want is a co2 reactor. You may be able to use your existing unit and add biobals or something to that to make it a co2 reactor.
1 reactor per tank
you can run many reactors of of one co2 cyliner with a splitter

The contrller can only be used to monitore / switch / on / off the solenoid valve on one co2 REGULATOR though

I understand there are differnces between running a Ca reactor and a Co2 reactor just wondering if it's compatable to run a Ca as a c02 with like you say installing bio-balls or something.

I cannot see any reason why you could not use the existing unit you have . Fill it with whatever media you decide. Bioballs work great so do the ceramic hagan rings or any other knock off. make sure the top is the inflow and the bottom the outflow back into the tank and you are set